4 files changed, 8 insertions, 4 deletions
diff --git a/library/core/src/num/f128.rs b/library/core/src/num/f128.rs
index 6088fb6fa17..b0c9e9ef05e 100644
--- a/library/core/src/num/f128.rs
+++ b/library/core/src/num/f128.rs
@@ -1196,7 +1196,8 @@ impl f128 {
     #[inline]
     #[must_use]
     #[unstable(feature = "f128", issue = "116909")]
-    pub fn total_cmp(&self, other: &Self) -> crate::cmp::Ordering {
+    #[rustc_const_unstable(feature = "const_cmp", issue = "143800")]
+    pub const fn total_cmp(&self, other: &Self) -> crate::cmp::Ordering {
         let mut left = self.to_bits() as i128;
         let mut right = other.to_bits() as i128;
 
diff --git a/library/core/src/num/f16.rs b/library/core/src/num/f16.rs
index 3f66c5973d4..56db92f91fc 100644
--- a/library/core/src/num/f16.rs
+++ b/library/core/src/num/f16.rs
@@ -1175,7 +1175,8 @@ impl f16 {
     #[inline]
     #[must_use]
     #[unstable(feature = "f16", issue = "116909")]
-    pub fn total_cmp(&self, other: &Self) -> crate::cmp::Ordering {
+    #[rustc_const_unstable(feature = "const_cmp", issue = "143800")]
+    pub const fn total_cmp(&self, other: &Self) -> crate::cmp::Ordering {
         let mut left = self.to_bits() as i16;
         let mut right = other.to_bits() as i16;
 
diff --git a/library/core/src/num/f32.rs b/library/core/src/num/f32.rs
index ebce89e5b3d..57be4d8d30a 100644
--- a/library/core/src/num/f32.rs
+++ b/library/core/src/num/f32.rs
@@ -1353,9 +1353,10 @@ impl f32 {
     /// }
     /// ```
     #[stable(feature = "total_cmp", since = "1.62.0")]
+    #[rustc_const_unstable(feature = "const_cmp", issue = "143800")]
     #[must_use]
     #[inline]
-    pub fn total_cmp(&self, other: &Self) -> crate::cmp::Ordering {
+    pub const fn total_cmp(&self, other: &Self) -> crate::cmp::Ordering {
         let mut left = self.to_bits() as i32;
         let mut right = other.to_bits() as i32;
 
diff --git a/library/core/src/num/f64.rs b/library/core/src/num/f64.rs
index 91e3949fc39..748956ae980 100644
--- a/library/core/src/num/f64.rs
+++ b/library/core/src/num/f64.rs
@@ -1351,9 +1351,10 @@ impl f64 {
     /// }
     /// ```
     #[stable(feature = "total_cmp", since = "1.62.0")]
+    #[rustc_const_unstable(feature = "const_cmp", issue = "143800")]
     #[must_use]
     #[inline]
-    pub fn total_cmp(&self, other: &Self) -> crate::cmp::Ordering {
+    pub const fn total_cmp(&self, other: &Self) -> crate::cmp::Ordering {
         let mut left = self.to_bits() as i64;
         let mut right = other.to_bits() as i64;